I like the native plant approach. In the PNW we have so many vibrant plants growing wild that can be domesticated. Even in the drought they are brilliant.
As for climate change, the science seems compelling enough. I personally think that alot of the problem with increased CO2 is loss of trees and phytoplankton in some areas.
Trying to get people to change is not going to be effective. Technology will have to come to the rescue. The only way to fix any of this is to make it economically viable. I don't mean by draconian taxes. I mean by finding a way to make doing the right thing for the environment profitable.
Since I was a kid the population has more than doubled. We are nearing the carrying capacity of the planet. We will see more catastrophies as we go. I have been surprised and saddened by the anti-science and anti-vaccination crowd. In my opinion if you don't want to get vaccinated that is your business, but you should not be allowed to burden the hospital if you get sick. The same medical science treats the sick as made the vaccines.
The US tried to deal with pollution by sending those industries to places with no regulations. We need to quit crapping in our nest.
As far as preserving the environment goes, hunters and anglers have been providing the vast majority of the effective solutions. I am proud to be a "hook and bullet" conservationist.
Sorry for the rant!